Power-hammer.



K. SALO & M. SHERMAN.

POWER HAMMER.

APPLICATION FILED SEPT. 5. I916- Patented Feb. 5, 1918.

2 SHEETS-SHEET'I.

WITH/885: 6 f IIVI/ENTORS:

K. SALO & M. SHERMAN.

POWER HAMMER.

APPLICATION FILED SEPT. 5. I916.

Patenfed Feb. 5,1918.

2 SHEETS-SHEET 2 lNl/E/VTUHS:

A TTOR/VEY WIT/Vt SSES.

connected to an elastic u 'rnn sTArns PATENT OFFICE.

KARL SALO AND MI AEDSHEBM N,

Q 5 INDI NA POLIS, INDIANA.

rewrite-Hamming. 5

. Application filed S ptem e 5, 1916. Serial No. 118,496. m

Q i of the idly and with moderate power on meta more especially forshaping sheet metal" to various forms,

the invention spring or elastic yoke that is eonnectedwith a crank pin,the latter being operated under control at intervals by means ofsuitable clutch connections.

hammer body to the controlling spring in machines of the abo e-mentionedcharacter, which connecting means shall be strong and saving in cost ofmate to provide improved means for operating and controlling the clutchmechanism whereby the operation of the" hammer is controlled,in order toattain durability and ef- I in an improved manner and avoldficiency lossof time and expense usually entailedbecause'fof the necessity for makingfrequent repairs to the machine.

With the above-mentioned and other objects in view the inventionconsists in im-' proved means whereby consisting also in improved meansfor; operating and controlling a clutch device"; and,

further the invention consists also in the novel parts and combmatlons'and arrangements of described panying claims.

parts as hereinafter particularly which Specification of Letters lateut.

jhavingreferonce more particularly to the type of power hammer in whichthe body of the hammer is actuated and controlled means of a hammer bodyi .YQ he invention body 18 is and further defined inthe accom-,,

pivptal devices.

PatentedFeb. 5, 1918.

parts of the improved means for connecting' the hammer body to itsoperatin yoke. Fig. 5 is a section on the line V on Fig. 1. Fig. 6 is aperspective view of the improved hammer body. Fig. 7 is a section on theline VII-VII on Fig. 2. Fig. 8 is a fragmentary section on the line VIII, VIII on Fig. 1.' Fig.9 is a. fragmentary section also on the lineVIII-VIII. Fig. 10 is a perspective view of the improved devicescomprised inthe connections between the hammer body and its operatingyoke: Fig. 11 is a central section of one of the rollers with which themachine is commonly provided. Fig. 12 is a vertical section of thehammer body on the line XII-XII on Fig. 7. Fig. 13 is'a section on theline XIII- XIII on Fig. 2. Fig. 14 is a perspective view of the improvedroller comprised in the improved clutch controller.

Similar reference characters on the differit 'ent figures of thedrawings indicate like ele- An object of the invention is to provideimproved means whereby to connect the.

ments or features of constructionherein referred toflin detail. a

The particular machine with which the invention is illustrated and towhich the invention is advantageously applied comprises a pillar 1 whichsupports a table in the formof a projecting arm. 2 having an anvil3thereon provided with a removable die or block 4:. The pillar supportsalso a frame 5 above the arm which has a guide head 6 on its end, adrivingshaft 7 being rotatably mounted in the frame and having crankplate or disk 8 secured thereto to which. a crank pin 9 is adjustablyconnected so as to vary the length of stroke of the hammer.A..connecting rod 10 is connected to the crank .pin and hasa bow-shapedspring or flexible yoke 11 secured thereto. Two links 12 and 13 arepivotally connected to one end of .the spring or yoke and the links havea roller 14 connected thereto... Two links 15 and16 are pivotallyconnected to the opposite end of the'spring or yoke andhave a roller 17connected thereto. A hammer guided for vertical movement on the guidehead 6 and has a suitable dieyor hammer head 19. removably connectedtherep tytdcoiiperate withthedie or block i of Referring to thedrawings,.-Figu1-e 1 isa. front elevation and Fig. 2 a side elevation-lof a popular type; of power-- hammer to} he invention is applied. Fig. 3isai nected in an improved manner with the rollers .14 and .17, I therollers In carrying outthe objects of the invention the hammer body 18is provided with holes 21 and'22 forward of the aperture and alsosockets 23 and 24 rearward of the aperture to fornr pivot bearings inwhich pivots 25 and 26 are removably supported,

onelpivotextending through the bearing 21 is provided. The retaining pinis suitably secured in place, being preferably provided with a head onone end and a key 32 in its opposite end. The rollers 27 and 28preferably have oil holes 33 therein. Two metallic links are'provided'for connecting the hammer head with the elastic-yoke andpreferably' arecomposed of steel, one link having a straight main portion 34 on theends of which are crooks 35 and 36, one crook embracing the rollerl andthe other embraccarried about the axis of theshaft 7, with ing theroller 27. Both links arealike, the remaininglink having a main portion37 on which are crooks 38 and 39, one crook embracing the roller 17, theother embracing the roller 28. The arrangement of the links that connectthe hammer body with the yoke is such that permits free pivotal movementof the links when the yoke rocks relatively to the hammer body as thecrank pin 9 is the minimum 7 resistance and wear in the pivotalconnections. I

In the machine described the shaft 7has apulley 4C0 rotatably mountedthereon and a driven by a belt 11, the pulley being pro-.

vided Iwith'a suitable clutch device 42 which is adapted to befrictionall'y engaged by a metallic clutch sleeve 43 that is splined onthe. shaft and has a circumferential groove 14 to receive controllingdevices. When op-.

erating the machine the clutch sleeve is'frequently moved with theresult that the side walls of the groove are rapidly worn away and thefaces of the walls become deformed due to uneven wear of the metalthereof. A shifter is provided which'has two arms 45' and 16 and issupported on a pivot' shaft 4:7" mounted on the frame 5 and providedwith an operating arm l8.which may be variously operated, beingpreferably connected by suitable means with a springretracted foot lever49 mounted on the pillar l'of the machine. carrying out the object ofthe invention, are provided with metallic stub axles 50 and 51respectively that extend into the groove 44 and have rollers 52 and 53thereon that con The arms 45 and 46, in

posed of suitable metal that differs in character from that ofthe metalof the axles on which the bushings rotate. The metals are of suitablecharacter to enable the several parts to operate with the minimum amountof wear when not supplied with lubricating oil and permit the rollers torotate in contact with the wall of the groove 4%, especially on beingforced into contact therewith when the clutch sleeve is forced intocontact with the clutch device of the pulley. In practical use thepulley 40 may rotate idly on its shaft until the workman arranges hiswork, and when hammering is required the operator causes the clutch'shifter to be moved to bring the-clutch sleeve 1 forward into contactwith the clutchidevice 42 which enables the pulley to rotate thedriving'shaft 7 to operate the hammerin the customary manner but withoutentailing destructive wear of the appliances. whereby the hammer body isconnectedwith the elastic yoke orsprin'g 11, excessive wearand renewalsof the stub axles or pins 50 and'51 being also avoided as a result ofthepresent improvement. V

Having thus described the invention, what is claimed as new isv 1. In apower hammer,rthe combination of a hammer body'having an openingtherein, two pivots connected to the hammer body and extending acrossthe openingv therein, two rollers on the pivots-respectively within theopening, two metallic links comprising each a straight main portion and.a crook on each end thereof, one crook of one of the links embracing oneof the rollers,one crook of the remaining link embracing theremainingroller, a roller embraced by the remaining one of the crooksofone of the 1inks,.a roller embraced bythe remaining one of thecrooks-oftheremaining link, two pivots in thetwo last-describedrollersrespectively and two pairs oflinks, one pair being connected toone of the use described pivots, the remainingpair of linksbeing'connected to the other. of the'lastdescribed pivots, with meansfor movably guiding thehammer, andmeans connected to the pairs of linksfor moving the hammer body: i a

2'. In a power hammer, the combination of a hammer body having anaperture therein and also pivot bearings on opposite sides'of theaperture,- the bodv having also a pin hole extending therethroughand'intersecting the pivot bearings, two pivots extending I through theaperture and seated in the bear-' ings on opposite sides of theaperture,eachf V ture,

guided by the frame,

pivot having a pin hole therein, two rollers onthe pivots respectivelywithin the apera retaining pin inserted in all the pin holes, a securingdevice holding the retaining pin in the pin holes, and two linksconnected to the rollers respectively, with means for movably guidingthe hammer body, and means connected to the links for. moving the hammerbody.

3. In a power hammer, the combination with a frame, a hammer bodymovably a shaft rotatably mounted on the frame, means connected with theshaft and the hammer body adapted to operate the body, a pulleyrotatably mounted on the shaft and having a clutch device thereon, and ametallic clutchsleeve splined on the shaft and adapted to be engagedwith the clutch device, the sleeve having a circumferential groovetherein, of a shifter lever pivotally mounted on the frame and havingtwo arms provided each with a metallic stub axle that extends into thegroove, each axle having a metallic roller thereon to contact with theopposite walls of the groove, the roller havin a metallic bushingtherein that bears on t e stub axle and differs from the character ofthe metals of the axle and the roller, the metal of the roller differingfrom that of the sleeve.

In testimony whereof, we afiix our signatures in presence of twowitnesses.

KARL SALO. MICHAEL SHERMAN. Witnesses:

L. M. ROWE, E. M. CRAWFORD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

